Two step activation of oligomerization catalyst and oligomerization of olefinic compounds in the presence of an activated oligomerisation catalyst thereby

摘要

A method of producing an oligomeric product by oligomerizing at least one olefinic compound by contacting the at least one olefinic compound with an oligomerisation catalyst and catalyst activator comprising two components, namely: i) a first component selected activator from the group consisting of aluminoxane and a mixture of at least one aluminoxane and at least one trialkylaluminum compound; and ii) a second activator component which is a trialkylaluminum compound; It said method characterized by the oligomerization catalyst is contacted first with one of the first activator component or the second component of activator catalyst activator being, and the resulting mixture is then contacted with the other of the first activator component or the second component of activator catalyst activator, wherein the oligomerization catalyst includes a combination of (i) a source of chromium; and (ii) a compound of ligation of formula (R1) MX1 (Y) X2 (R2) n wherein: both X1 and X2 are P; Y is a linking group between X1 and X2; m and n are independently 0, 1 or a larger integer; and R1 and R2 are independently hydrogen, a hydrocarbyl group or a heterohydrocarbyl group, and R 1 being the same or different when m 1, and R2 being the same or different when n 1.